Quote Originally Posted by biggerdave View Post
Normally when you twist the ring it kinda over-locks/clicks when as tight as it goes?
Yes that's correct.

I had the 750 from brand new and must admit when i first saw the method used to secure the sucker to the screen, it didn't fill me with much confidence. Drive a few uneven/rough roads as i often do touring in East European countries and any 750 owner will soon experience exactly the same as me!